Confirmed that 2.2.1 still suffers from this with stock theme and picker config on all devices...

We've had success working around this by setting absolute picker heights in pixels on the slot bar and the slot items.

The issue stems from em units being used to size the bar and the slot, and the picker layout and selected item calculation relying on them being the exact same height when a ton of factors can cause the em heights of the two far-separated elements to resolve to different pixel heights.

Since the picker operates on the assumption that the bar and slot items are the same height, rather than relying on the theme to get them there, the framework should programmatically set the bar height to the measured height of the first slot item.